[thrdbndndn]

I'm not well-versed in the terms, so I'm not sure which part is the so-called "audio aliasing."

To me, the original has very obvious background noise which the enhanced version removes. But as the author has said, the enhanced version sounds "muffled" (and, IMHO, not just a little), which probably makes most people (including me) feel it sounds worse.

Also, shouldn't most of music be included in the game's official OST? I assume that version would not be limited by the game media's technical limitation at the time and should represent the artistically intended version best.

Edit: apparently in this very case, "Metroid: Zero Mission" doesn't seem to have any official OST release. Unfortunate.